Legions contains 145 black-bordered cards (45 rare, 45 uncommon, and 55 commons; 1 rare and 1 uncommon extra compared to earlier small sets). Its expansion symbol is a shield with two crossed spears, a sort of heraldic crest meant to evoke the themes of Legions. Like its preceding expansion, Onslaught, and following expansion, Scourge, the featured a theme that focused heavily on "tribal" cards, or cards that are concerned with creature types. Legions was notable for being the first creature-only set in Magic history and also marked the return of Slivers.